private void logItemsScroll_ScrollChanged(object sender, ScrollChangedEventArgs args)
{
bool cond = logItemsScroll.VerticalOffset >= logItemsScroll.ScrollableHeight - 50;
// e.VerticalChange can actually be 0, so test for positive and negative values explicitly
if (args.VerticalChange > 0)
{
// Scrolled down, can only set flag if in range
logItemsScrolledNearEnd |= cond;
}
else if (args.VerticalChange < 0)
{
// Scrolled up, can only clear flag if out of range
logItemsScrolledNearEnd &= cond;
// Stop the scroll animation immediately when scrolling up
if (DependencyPropertyHelper.GetValueSource(logItemsScrollMediator, ScrollViewerOffsetMediator.VerticalOffsetProperty).IsAnimated)
{
if (logItemsScrollMediator != null) // Should always be true here
{
logItemsScrollMediator.StopDoubleAnimation(ScrollViewerOffsetMediator.VerticalOffsetProperty);
logItemsScrollPixelDc.Fire();
}
}
}
}
public void AnimateStatusText(string newText)
{
int durationMs = 300;
TimeSpan duration = TimeSpan.FromMilliseconds(durationMs);
double offset = Math.Max(15, StatusText.ActualHeight);
// Prepare animation
if (statusTextAnimationDc != null)
{
statusTextAnimationDc.Fire();
}
StatusTextShadow.Text = newText;
// Animate both text blocks
AnimationHelper.AnimateEaseOut(StatusTextTranslateTransform, TranslateTransform.YProperty, 0, -offset, duration);
AnimationHelper.AnimateEaseOut(StatusText, TextBlock.OpacityProperty, 1, 0, duration);
AnimationHelper.AnimateEaseOut(StatusTextShadowTranslateTransform, TranslateTransform.YProperty, offset, 0, duration);
AnimationHelper.AnimateEaseOut(StatusTextShadow, TextBlock.OpacityProperty, 0, 1, duration);
// Finish up animation
statusTextAnimationDc = DelayedCall.Start(StatusTextAnimationFinished, durationMs);
}